{"affected":[{"defaultStatus":"unaffected","ecosystem":"https://pkg.go.dev","packageName":"mime","product":"mime","source":"CNA: Go","vendor":"Go standard library","versions":[{"lessThan":"1.25.11","status":"affected","version":"0","versionType":"semver"},{"lessThan":"1.26.4","status":"affected","version":"1.26.0-0","versionType":"semver"}]}],"cveId":"CVE-2026-42504","cwes":["CWE-407"],"description":"Decoding a maliciously-crafted MIME header containing many invalid encoded-words can consume excessive CPU.","epss":{"date":"2026-11-01","percentile":0.46636,"score":0.0056},"exploits":[],"kev":null,"metrics":[{"score":7.5,"severity":"high","source":"ADP: CISA-ADP","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}],"modifiedAt":1793575127449,"publishedAt":1780437697219,"references":[{"source":"CNA: Go","tags":[],"url":"https://go.dev/issue/79217"},{"source":"CNA: Go","tags":[],"url":"https://go.dev/cl/774481"},{"source":"CNA: Go","tags":[],"url":"https://groups.google.com/g/golang-announce/c/tKs3rmcBcKw"},{"source":"CNA: Go","tags":[],"url":"https://pkg.go.dev/vuln/GO-2026-5038"}],"remediation":[],"revision":"f76141579f81362055d31a7a096b5db8d7bfc959d847b0b0e1c6a0635e9d38cb","sources":[{"modifiedAt":1793575127449,"name":"CNA: Go","retrievedAt":1793578103093,"url":"https://www.cve.org/CVERecord?id=CVE-2026-42504"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793578104297,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-42504"}],"ssvc":{"assessedAt":1780495539682,"automatable":"yes","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Quadratic complexity in WordDecoder.DecodeHeader in mime","updatedAt":1793578104297}